title: Surface X-ray scattering of stepped surfaces of platinum in an electrochemical environment: Pt(331) = 3(111)-(111) and Pt(511) = 3(100)-(111).
abstract: Real surface structures of the high-index planes of Pt with three atomic rows of terraces (Pt(331) = 3(111)-(111) and Pt(511) = 3(100)-(111)) have been determined in 0.1 M HClO(4) at 0.1 and 0.5 V(RHE) with the use of surface X-ray scattering (SXS). The surfaces with two atomic rows of terraces, Pt(110) = 2(111)-(111) and Pt(311) = 2(100)-(111) = 2(111)-(100), are reconstructed to a (1 × 2) structure according to previous studies. However, the surfaces with three atomic rows of terraces have pseudo-(1 × 1) structures. The interlayer spacing between the first and the second layers, d(12), is expanded 13% on Pt(331) compared to that of the bulk, whereas it is contracted 37% on Pt(511). The surface structures do not depend on the applied potential on either surface.
authors.affiliation: Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522 Japan. hoshi@faculty.chiba-u.jp
authors.forename: Nagahiro
authors.initials: N
authors.lastname: Hoshi
authors.forename: Masashi
authors.initials: M
authors.lastname: Nakamura
authors.forename: Osami
authors.initials: O
authors.lastname: Sakata
authors.forename: Akira
authors.initials: A
authors.lastname: Nakahara
authors.forename: Keita
authors.initials: K
authors.lastname: Naito
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ogata